The M2351 series is equipped with 32 Kbytes Secure Boot ROM as root of trust, multiple firmware programming tools by In-System Programming (ISP), In-Circuit Programming (ICP) and In-Application Programming (IAP). In addition to TrustZone software protection mechanism, it also supports eXecution Only Memory (XOM), LDROM (user program loader) and multiple cryptographic hardware accelerators which are used to protect the core software and data assets on a microcontroller system. The M2351 series also integrates a 8 COM x 40 SEG controller with internal charge pump for segment LCD panel and provides high performance connectivity peripheral interfaces such as UART, SPI, I²C, GPIOs, USB and ISO 7816-3 for smart card reader.

As to Power efficiency, the M2351 series supports Brown-out detector, Power-down mode with RTC turn on, RAM retention less than 2.0 uA, deep power-down mode with RAM retention less than 1 uA and fast wake-up via multiple peripheral interfaces.